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Dissertations / Theses on the topic 'Cobalt crystals'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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1

Antonelli, Sarah Bowen. "Studies of the thermal stability and crystallization behavior of electroless and evaporated nickel and cobalt alloy films /." view abstract or download file of text, 2006. http://proquest.umi.com/pqdweb?did=1251855711&sid=1&Fmt=2&clientId=11238&RQT=309&VName=PQD.

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Thesis (Ph. D.)--University of Oregon, 2006.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 105-120). Also available for download via the World Wide Web; free to University of Oregon users.

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2

LOPES, ARTUR J. da S. "Sintese e refino por zona de fluoretos para crescimento de cristais laser: BaLiF sub(3):Co sup(2)." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10960.

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3

Butterfield, Martin Thomas. "Surface structure of ultrathin metal films deposited on copper single crystals." Thesis, Loughborough University, 2000. https://dspace.lboro.ac.uk/2134/33132.

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Ultrathin films of Cobalt, Iron and Manganese have been thennally evaporated onto an fcc Copper (111) single crystal substrate and investigated using a variety of surface structural teclmiques. The small lattice mismatch between these metals and the Cu (111) substrate make them an ideal candidate for the study of the phenomena of pseudomorphic film growth. This is important for the understanding of the close relationship between film structure and magnetic properties. Growing films with the structure of their substrate rather than their bulk phase may provide an opportunity to grow materials w

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4

Dickinson, Calum. "Metal oxide porous single crystals and other nanomaterials : an HRTEM study." Thesis, University of St Andrews, 2007. http://hdl.handle.net/10023/217.

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Three-dimensional porous single crystals (PSCs) are a recent development in the growing world of mesoporous material. The mesoporosity allows for the material to retain their nanoproperties whilst being bulk in size. The current work concentrates on chromium oxide and cobalt oxide PSCs formed in the templates SBA-15 and KIT-6. HRTEM is the main technique used in this investigation, looking at the morphology and single crystallinity of these materials. A growth mechanism for the PSC material is proposed based on HRTEM observations. XRD studies revealed that the confinement effect, caused by the

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5

Ávila, Gutiérrez Mario Alberto. "Effet de la nanocristallinité sur les croissances homogènes et hétérogènes des supercristaux magnétique de cobalt." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS008.

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Les auto-organisations à 3D de nanocristaux (NCx) métalliques constituent une nouvelle génération de matériaux nanostructurés, appelés supercristaux. Ils présentent de nouvelles propriétés collectives, ce qui permet de les impliquer dans différentes applications technologiques. Dans cette thèse, nous proposons une étude comparative concernant la croissance hétérogène et homogène en absence ou présence d’un champ magnétique, de supercristaux de nanocristaux de cobalt obtenus par la voie micellaire (7,5 nm, σ: 11 %, type cfc) et par la dismutation d’un sel organométallique ([CoCl(PPh3)3]) (9 nm,

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Desvaux, Céline. "Synthèse et propriétés physiques de super-cristaux millimétriques de nanoparticules de fer/cobalt : vers des inducteurs intégrés." Phd thesis, Université Paul Sabatier - Toulouse III, 2006. http://tel.archives-ouvertes.fr/tel-00135842.

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La fabrication d'inducteurs haute performance et basse consommation est nécessaire au développement de la téléphonie mobile. Ceci requiert le dépôt en couche mince d'un matériau magnétique doux présentant une perméabilité élevée et une fréquence de résonance au-delà de la fréquence d'utilisation. Ces propriétés peuvent être obtenues grâce à un matériau nanostructuré constitué de particules ferromagnétiques à température ambiante, monodisperses et organisées en super-réseaux. La décomposition contrôlée de précurseurs organométalliques permet la synthèse d'un matériau constitué de nanoparticules

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Abou, Diwan Elie. "Matériau composite de silice dopée par des nanoparticules magnétiques de ferrite de cobalt : influence de la structuration 3D sur le comportement spectral de l'effet Faraday." Thesis, Saint-Etienne, 2014. http://www.theses.fr/2014STET4015/document.

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Le laboratoire LT2C utilise depuis quelques années un procédé sol-gel basse température pour développer un matériau magnéto-optique composite parfaitement compatible avec les technologies d’optique intégrée sur verre. Néanmoins, la qualité actuelle du matériau ne permet pas son utilisation dans l’intégration des composants à effets non-réciproques. Dans le but d’exalter les effets magnéto-optiques et le facteur de mérite du matériau, le laboratoire LT2C s’est orienté vers sa structuration 3D en adaptant une approche basée sur les opales. Cette dernière consiste à fabriquer des opales directes

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8

De, Pauw Virginie. "Mécanismes de nitruration et d'oxydation du composé intermétallique Sm2 (Fe, Co)1#7 pour aimants permanents." Rouen, 1996. http://www.theses.fr/1996ROUES053.

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L'étude des mécanismes de nitruration du composé intermétallique Sm2 (Fe, Co)1#7 est effectuée sur des échantillons massifs à l'aide de la diffraction des rayons X et de la microscopie électronique à balayage. Nous avons utilisé deux modes de nitruration (lit fluidisé et flux gazeux) afin de comparer les processus mis en jeu lors du traitement. Des comportements différents interviennent au niveau de la distribution de l'azote dans les échantillons, des cinétiques de nitruration globale et de la couche de surface. Il apparaît que la diffusion de l'azote est principalement volumique dans le cas

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9

Mwenesongole, Ellen. "A Raman- and XRD study of the crystal chemistry of cobalt blue." Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-11292009-214916/.

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10

Ramsvik, Trond. "Surface science studies of Cobalt and Rhodium single crystal surfaces." Doctoral thesis, Norwegian University of Science and Technology, Department of Physics, 2001. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2000.

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<p>The main topic of this thesis is the investigation of small molecules adsorbed on the transition metals cobalt and rhodium surfaces by means of predominantly high-resolution core level photoemission and near edge x-ray absorption fine structure (NEXAFS). The thesis can be divided into three parts where the following phenomena are examined:</p><p>1) internal molecular vibrations in the core level photoemission spectra</p><p>2) hybridisation and thermal decomposition of adsorbates</p><p>3) growth and surface alloy formation of metal-on-metal systems</p><p>The influence on the C 1s spectra of

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Rafique, Hafiz Muhammad. "Resonant and high resolution photoemission of rare-earth cobalt oxides." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/resonant-and-high-resolution-photoemission-of-rareearth-cobalt-oxides(33377a1a-670c-413d-a38f-73c52115b5e5).html.

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LnBaCo2O5+δ (Ln-112) where Ln = lanthanide element; 0 ≤ δ ≤1 and LnBaCo4O7+δ (Ln-114) are highly correlated cobalt oxides. Synchrotron photoemission spectroscopy of LnBaCo2O5+δ (Ln = Gd, Dy, Dy1-xTbx) and LnBaCo4O7 (Ln = Yb) has been undertaken at the UK Synchrotron Radiation Source (Daresbury Laboratory).During the photoemission experiments, the samples were observed to be contaminated due to residual gases inside the main vacuum chamber. The surface degradation of the samples is studied using the difference spectra generated from the valence band spectra of freshly scraped and contaminated s

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Ballou, Rafik. "Anisotropies magnétiques du cobalt dans les composés intermétalliques lanthanide-cobalt." Grenoble 1, 1987. http://www.theses.fr/1987GRE10114.

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Analyse phénoménologique des processus d'aimantation des composes YCo5 et GDCo5 mettant en évidence une anisotropie des interactions d'échangé Ln-Co liée à l'anisotropie de polarisation des électrons 5d de l'atome Ln. Etude de l'incidence de l'instabilité du magnétisme de bande 3d sur l'anisotropie magnétique dans les phases Ln2Co7 et LnCo3. Etude de l'anisotropie des systèmes à empilement quasi-unidimensionnel LnCo(1-epsilon ). Analyse de la sélection orbitale induite par les intégrales de transfert

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Patra, Ajit Kumar. "Crystal structure, anisotropy and spin reorientation transition of highly coercive, epitaxial Pr-Co films." Göttingen Cuvillier, 2008. http://d-nb.info/990884759/04.

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14

Kpogo, Kenneth K. "X-ray crystal structures of: [Rh2(N-{2,4,6-CH3}C6H2)COCH3)4]•2NCC6H4 AND Ba1.5[Fe(C10H13N2O7)][Co(CN)6]•9H2O; two crystallographic challenges." Digital Commons @ East Tennessee State University, 2013. https://dc.etsu.edu/etd/1175.

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The novel compound, [Rh2(N-{2,4,6-CH3}C6H2)COCH3)4] was synthesized. Crystal structures of [Rh2(N-{2,4,6-CH3}C6H2)COCH3)4]·2NCC6H5 and Ba1.5[Fe(C10H13N2O7)][Co(CN)6]·9H2O were determined employing a Rigaku Mercury375R/M CCD (XtaLAB mini) diffractometer with graphite monochromated Mo-Kα radiation. For [Rh2(N-{2,4,6-CH3}C6H2)COCH3)4]·2NCC6H5, the space group was P-421c(#114) with unit cell dimensions: a =11.0169(14)Å, c =21.499(3)Å, V = 2609.4(6)Å3. Each rhodium had approximately octahedral coordination and was bound to another rhodium atom, two nitrogens (trans to each other), two oxygens (tran

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Chioncel, Mariana F. "Cobalt thin films produced by conventional and photo-assisted metal-organic chemical vapour deposition." Thesis, Keele University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327638.

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Schumer, Benjamin N., Marcelo B. Andrade, Stanley H. Evans, and Robert T. Downs. "A new formula and crystal structure for nickelskutterudite, (Ni,Co,Fe)As-3, and occupancy of the icosahedral cation site in the skutterudite group." MINERALOGICAL SOC AMER, 2017. http://hdl.handle.net/10150/623060.

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We propose a new formula for the mineral nickelskutterudite, based on our observation that either (or both) Co or Fe3+ are essential structure constituents. The crystal structure of nickelskutterudite, (Ni,Co,Fe) As-3, cubic, Im (3) over bar, Z = 8: a = 8.2653(6) angstrom, V = 564.65(7) angstrom, has been refined to R-1 = 1.4% for 225 unique reflections I > 2 sigma(1) collected on a Bruker X8 four-circle diffractometer equipped with fine-focus, sealed tube MoKa radiation and an APEX-II CCD detector. This is the first report of the crystal structure of nickelskutterudite. Nickelskutterudite, a

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Mandia, David J. "NC-AFM and XPS Investigation of Single-crystal Surfaces Supporting Cobalt (III) Oxide Nanostructures Grown by a Photochemical Method." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23117.

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The work of this thesis comprises extensive Noncontact Atomic Force Microscopy (NC-AFM) characterization of clean metal-oxide (YSZ(100)/(111) and MgO(100)) and graphitic (HOPG) supports as templates for the novel, photochemically induced nucleation of cobalt oxide nanostructures, particularly Cobalt (III) Oxide. The nanostructure-support surfaces were also studied by X-ray Photoelectron Spectroscopy (XPS) to verify the nature of the supported cobalt oxide and to corroborate the surface topographic and phase NC-AFM data. Heteroepitaxial growth of Co2O3 nanostructures proves to exhibit a variety

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Millard, Matthew David. "Isolation of Four-Coordinate Iridium(I) Monohydrides and the X-ray Crystal Structure of a Cobalt Tris-Isocyanide Alkane sigma-Complex." Thesis, University of California, San Diego, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3594595.

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<p> Detailed herein are the synthesis, characterization, and reactivity of three isolable four-coordinate iridium(I) monohydride complexes. Iridium(I) monohydrides containing the simple formula HIrL<sub>3</sub> have been postulated as reactive intermediates for over four decades escaping definitive evidence. The judicious use of the C–H activation resistant methyleneadamantyl phosphine P(CH<sub>2</sub><sup>1</sup>Ad)(<i>i</i>-Pr)<sub> 2</sub> (abbreviated L<sup>mAd</sup>) and phosphinite P(O<sup>1</sup>Ad)(i-Pr)<sub> 2</sub> (abbreviated L<sup>oAd</sup>) ligands allowed for the successf

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Wong, Wing-tak, and 黃永德. "Crystal structure analysis of some gold (I) isocyanide complexes and cobalt complexes of N, N'-bis-(2'-pyridinecarboxamide)-1, 2-benzene." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31208435.

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Wong, Wing-tak. "Crystal structure analysis of some gold (I) isocyanide complexes and cobalt complexes of N, N'-bis-(2'-pyridinecarboxamide)-1, 2-benzene /." [Hong Kong : University of Hong Kong], 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1235885X.

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21

DUARTE, MARCOS. "Caracterizacao do BaLiFsub3:Cosup2+ visando sua utilizacao como meio laser ativo .Estudo de suas propriedades espectroscopicas e determinacao da difusidade termica." reponame:Repositório Institucional do IPEN, 1994. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10408.

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Cyganok, Pavel. "Judrios magnetofotoninės sistemos nano dalelė – skystasis kristalas magnetooptinės savybės." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080924_182935-73352.

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Šiame darbe tiriamos skystojo kristalo su integruotomis kobalto nanodalelėmis optinės savybės. Panaudotos medžiagos: skystasis kristalas 5CB (penkiakomponentis cianobifenilas) ir kobalto nanodalelės kurių dydis 10nm. Tiriami pavyzdėliai su skirtingomis kobalto koncetracijomis (0,05%, 0,092%, 1,04%) skystajame kristale. Išmatuoti sugerties ir LD intensyvumo spektrai bangų ruože nuo 250 iki 700nm.<br>In this work I studied optical and manetooptical features of liquid crystal (LC) with integrated magnetic particles in magnetic field. I observed three different samples of LC with cobalt nanopartic

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James, Amy Frances. "Tin-oxide thin films by thermal oxidation." University of Western Cape, 2021. http://hdl.handle.net/11394/8239.

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>Magister Scientiae - MSc<br>Tin dioxide (SnO2) thin films are a worthy candidate for an electron transport layer (ETL) in perovskite solar cells, due to its suitable energy level, high electron mobility of 240 cm2 v-1 s- 1, desirable band gap of 3.6 - 4.0 eV, and ultimately proves to be suited for a low temperature thermal oxidation technique for ETL production. A variety of methods are available to prepare SnO2 thin films such as spin and dip coating and chemical bath deposition. However, the customary solid-state method, which incorporates thermal decomposition and oxidation of a meta

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Aouni, Abdessamad. "Aptitude à l'amorphisation par pulvérisation cathodique des systèmes Ni-C Co-C, Mn-C et étude structurale des produits de synthèse et de cristallisation." Vandoeuvre-les-Nancy, INPL, 1994. http://www.theses.fr/1994INPL091N.

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Des alliages MT-C avec MT = Ni, Co ou Mn ont été élaborés par pulvérisation cathodique en mode radiofréquence. Leur stabilité thermique et l'évolution de leurs structures sont suivies par analyse enthalpique différentielle, diffraction des rayons X et microscopie électronique à transmission in-situ. Les principaux résultats sont les suivants: système Ni-C: des alliages essentiellement cristallins Ni1-xCx avec 0,10 x 0,67 ont été élaborés. Le carbure Ni3C à sites octaédriques est toujours présent. Le comportement thermique du dépôt Ni0, 33C0,67 laisse supposer la présence d'une phase amorphe mé

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Vermeulen, Jean-Luc. "Elaboration par pulvérisation ionique et caractérisation de couches minces ferromagnétiques à forte perméabilité." Grenoble 1, 1993. http://www.theses.fr/1993GRE10071.

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Dans le cadre des applications employant des materiaux ferromagnetiques aux hyperfrequences, nous avons etudie les proprietes magnetiques et electriques de couches minces ferromagnetiques metalliques et dielectriques deposees par pulverisation ionique. Le premier volet de ce memoire se rapporte a l'installation de depot. Des parametres cles tels que l'orientation de la cible et la temperature du substrat font l'objet d'une analyse approfondie. Cette etude a permis ainsi d'aboutir a l'obtention de couches denses de qualite maitrisee. Sur la base de ces preliminaires, des films minces microcrist

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Fan, Wen-Hui, and 范文蕙. "Liquid Crystals of Cobalt, Nickel, Copper and Zinc Complexes Derived from Dihydrazone-Bipyridine Moiety." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/27022369767749881929.

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碩士<br>淡江大學<br>化學學系碩士班<br>94<br>The synthesis of new metal complexes based on hydrazones derived from 6,6’-dihydrazine- 2,2’-bipyridine has been carried out, and use different lengths of alkyl chains to modify the ligands (L1-Cn~L3-Cn). The complexes were prepared by adding the metal salts included of cobalt, nickel, copper and zinc. The molecular structure and purity of these novel compounds have been verified by NMR, ESI-Mass, elemental analysis, and the single crystal of [Zn(L1-C2)Cl2] were also obtained. The phase behavior and mesogenic properties of these compounds were determined by pol

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Rolfs, Katharina [Verfasser]. "Influence of the alloying element cobalt on the key properties of ferromagnetic shape memory Ni-Mn-Ga single crystals / Katharina Rolfs." 2011. http://d-nb.info/1011126052/34.

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Gusley, Ryan R. "Electrodeposition of Epitaxial Metals for the Fabrication of Single Crystal Interconnects." Thesis, 2021. https://doi.org/10.7916/d8-ngf1-ns45.

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The continued miniaturization of interconnects results in performance and reliability issues for integrated circuit (IC) chips. As the critical dimension of Cu interconnects approaches dimensions near the mean free path of the metal (39.9 nm at room temperature), a rise in resistivity is observed. This phenomenon, termed resistivity size effect, is the result of electron scattering at grain boundaries and surfaces. Cobalt (Co) and ruthenium (Ru) are considered promising candidates to replace Cu as an interconnect metal because these metals exhibit a lower product of mean free path times bulk r

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Müller, Sven. "Structural and optical impact of transition metal implantation into zinc oxide single crystals and nanowires." Doctoral thesis, 2009. http://hdl.handle.net/11858/00-1735-0000-0006-B487-7.

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Wu, Wen-Bin, and 吳文彬. "Hydrothermal Synthesis and Crystal Structures of Cobalt and Manganese Arsenates." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/07145271583555327324.

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陳志山. "Synthesis, Crystal Structures and Properties of Cobalt Phosphates and Iron Phosphatooxalates." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/84978835971898237278.

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Mwenesongole, Ellen Musili. "A Raman- and XRD study of the crystal chemistry of cobalt blue." Diss., 2009. http://hdl.handle.net/2263/29925.

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The aim of this research project was to synthesise both the normal and inverse cobalt aluminate spinels by various methods and characterise them mainly by Raman spectroscopy with the support of X-ray powder diffraction (XRD), Fourier transform infra-red spectroscopy (FT-IR), energy disperse spectroscopy (EDS), and scanning electron microscopy (SEM). Four different synthesis methods (glycine-gel, citrate-gel, polyol and solid-state) were used to synthesise the cobalt aluminate powders with the general formula CoIICoIIIxAl2-xO4 (where x = 0-2). The gel or powder precursors were annealed at vario

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Liang, Mei-Lang, and 梁美蘭. "Hydrothermal Syntheses, Crystal Structures and Physical Properties of Vanadium, Cobalt and Iron Arsenate." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/49770850961835914184.

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Horng, Jia Cherng, and 洪嘉呈. "Hydrothermal Synthesis, Crystal Structural Characterization and Physical Properties of Cobalt Arsenates and Phosphates." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/21971439474943966421.

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碩士<br>國立清華大學<br>化學學系<br>82<br>In this research, cobalt arsenates and phosphates are synth- esized via hydrothermal method. Six new cobalt arsenates and two new cobalt phosphates have been obtained. They are classified into four categories: 1.Co2X2O7(H2O)2 (X=As or P); ACoAs2O7 (A=Sr or Ba); VCo(OH)As2O7 2.KCo2(HAsO4)(AsO4) 3.CoCo6( OH)3(HAsO4)(AsO4)3 4.CuCo2(PO4)2(H2O) Co2As2O7(H2O)2 and Co2P2 O7(H2O)2 crystallize in the monocli- nic space group P2(1)/n. Both compounds are isostructural and

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Tsao, Tai-Hsing, and 曹泰興. "Hydrothermal Synthesis, Crystal Structures and Properties of Zinc, Cobalt, Nickel and Magnesium Coordination Polymers." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/48938506451963917381.

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碩士<br>中原大學<br>化學研究所<br>96<br>Abstract Seven new coordination polymers, [Zn2(mBDC)2(bpp)] (1), [Co2(mBDC)2(bpp)] (2), [Co(mBDC)(bpp)] (3), [Ni(H2O)(BDC)(bpp)] (4) [Mg2(BTEC)(H2O)4]•2H2O (5), [Mg2(BTEC)(H2O)6] (6) and [Mg2(BTEC)(H2O)8] (7) (bpp = 4,4’-trimethylene dipyridine; BDC = 1,4-benzene dicarboxylate anion; mBDC = 1,3-benzene dicarboxylate anion; BTEC = 1,2,4,5-Benzenetetracarboxylic acid), have been synthesized by hydrothermal reactions and structurally characterized. Single crystal X-ray diffraction showed that both compounds 1 and 2 are twofold interpenetrated three-dimensional structu

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Yang-HaoHsu and 許楊豪. "Effects of heat-treatment on crystal structure and electrical property of nickel-cobalt oxide." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/70993793910287840374.

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碩士<br>國立成功大學<br>材料科學及工程學系碩博士班<br>100<br>NiO and CoO may react and form a low-resisitivity spinel structure with P-type conducting behavior and become one of transparent conducting oxides. In this study, nickel and cobalt nitrates with adequate ratio were mixed and heated at 300˚C for 24 h. Single-phase NiCo2O4 spinel was obtained. However, when the spinel powder were heated at temperatures 500˚C, 1000˚C, and 1500˚C, (Ni, Co)O solid solution with rock-salt structure appeared with consumption of NiCo2O4 spinel. At temperatures greater than 1000˚C, most spinel phases converted into the rock-salt

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Hsu, Shih-Chen, and 徐世宸. "Hydrothermal Synthesis, Crystal Structures and Properties of Multi Dimensional Cobalt and Nickel Coordination Polymers." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/47817774763252736762.

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碩士<br>中原大學<br>化學研究所<br>97<br>The hydrothermal, solvothermal, and microwave assisted reactions of organic mixed-ligands with Ni(II) or Co(II) ions provided nine metal coordination polymers, [Ni2(MAL)2(bpy)(H2O)2](1), [Ni(NB)2(bpy)2](2), [Ni2(PDA)2(bpp)2(H2O)3]•H2O(3), [Ni(mBDC)(bpp)](4), [Co(NB)2(bpy)2](5), [Co2(NB)4(bpp)2(H2O)]•H2O(6), [Co(COD)(bpp)](7), [Ni2(COD)2(bpp)2(H2O)4] (8), and [Ni3(BTC)2(H2O)12] (9) (MAL = malonate anion; bpy = 4,4'-bipyridine; NB = 3-nitrobenzoate anion; PDA = 1.4-phenylenediacetate anion; bpp = 4,4’-trimethylene dipyridine; mBDC = 1,3-benzene dicarboxylate anion;

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Gharleghi, Ahmad, and 阿美德. "Wet chemicals synthesis and thermoelectric properties of cobalt skutterudites semiconductors towards the electron-crystal phonon-glass materials." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/4emj24.

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博士<br>國立彰化師範大學<br>物理學系<br>102<br>This dissertation presents experimental practices conducted to study the effect of synthesis methods on the thermoelectric properties of n-type cobalt skutterudite. In this effort, wet chemical preparation procedures are adopted. The produced powders are characterized using x-ray diffraction pattern, scanning electron microscopy, Hall and density measurements. The Seebeck coefficient (thermopower), electrical and thermal conductivity measurements are performed for all the fabricated samples. Various reaction conditions have been carried out to stabilize the CoS

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Walsh, Sean. "Rock Salt vs. Wurtzite Phases of Co1-xMnxO: Control of Crystal Lattice and Morphology at the Nanoscale." Thesis, 2012. http://hdl.handle.net/1911/71699.

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Diamond cuboid-, rhombohedron- and hexagon-shaped nanocrystals as well as branched rods of the solid solution Co1-xMnxO have been synthesized via a solvothermal synthetic route from manganese formate and cobalt acetate at elevated temperature. Rhombohedra and hexagons have dimensions no larger than 50 nm on the longest axis, rods have branches up to 150 nm long and cuboids grow up to 250 nm on a side. X-ray and electron diffraction and transmission electron microscopy analyses show that these nanoparticles are single crystals of wurtzite-type and rock salt-type Co1-xMnxO. Varying the surfactan

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Yu-WeiKuo and 郭又瑋. "Synthesis, investigation of crystal structures, thermal and magnetic properties of imidazolium and pyridinium salts of cobalt(Ⅱ) and manganese(Ⅱ)." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/20604766857951594423.

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碩士<br>國立成功大學<br>化學系碩博士班<br>100<br>It has been reported that the molten salts with dicationic system have higher magnetic susceptibility than monocationic counterion. It is an interesting discovery. However, the application of these kinds of molten salts are restricted because of their high melting point. In this study, we try to improve this drawback by increasing the carbon chain linked to two monocations of the molten salts. Besides, we also discuss the relationship between the carbon chain and magnetic susceptibility of these compounds. The salts consisting of dicationic (imidazolium, pyri

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Hung-ChinLin and 林弘巾. "The Effects of Small Amount of Cobalt Ion Substitution and Non-stoichiometry on Crystal Structure and Microwave Dielectric Properties of Ba(Mg1/3Nb2/3)O3 Ceramics." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/80872395326287921633.

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碩士<br>國立成功大學<br>資源工程學系碩博士班<br>98<br>There are two major experimental subjects in this study. The small amount of Co2+ substitution on Ba(Mg1/3Nb2/3)O3 and non-stoichiometry of Ba(Mg1/3Nb2/3)O3 were both investigated. The experimental results show that the ordering degree, mean grain size, and quality factor were increasing by small amount Co2+ substitution from x = 0.01 to x = 0.05, and could get an optimal value of quality factor at x = 0.05 (S = 92%, Q x f = 40,000 GHz). Moreover, through decreasing the cooling rate, the ordering degree increased 3% and the relative density increased 2% whic

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Ménard-Tremblay, Pierre. "Synthèse et caractérisation de complexes métalliques de ruthénium, fer et cobalt à base des ligands terpyridine et bipyridine pour l'obtention de cristaux liquides." Thèse, 2008. http://hdl.handle.net/1866/7808.

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Ζαγοραίου, Ειρήνη. "Σύμπλοκες ενώσεις του κοβαλτίου(ΙΙΙ) με τριδοντικές βάσεις Schiff που προκύπτουν από τη σαλικυλική αλδεΰδη και υποκατεστημένες 2-αμινοφαινόλες". Thesis, 2012. http://hdl.handle.net/10889/6194.

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Σε αυτή την εργασία περιγράφονται οι αντιδράσεις αλάτων του κοβαλτίου(ΙΙ) [Co(O2CMe)2•4H2O, Co(ClO4)2•6H2O και Co(O2CPh)2] με την Ν-σαλικυλιδενο-4- μεθυλο-ο-αμινοφαινόλη (saphΗ2-4Me), την Ν-σαλικυλιδενο-4-χλωρο-ο-αμινοφαινόλη (saphΗ2-4Cl) και την Ν-σαλικυλιδενο-ο-αμινοφαινόλη (saphΗ2). Από τo σύστημα αντίδρασης Co(O2CMe)2•4H2O/saphΗ2-4Me/ΝaΟΗ σε διαλύτη MeOH απομονώθηκε ένα οκταεδρικό σύμπλοκο με τύπο (Η5Ο2)[CoΙΙΙ(saph-4Me)2]•H2O (1). Χρησιμοποιώντας την Εt3N ως βάση, από ένα ανάλογο σύστημα αντίδρασης, απομονώθηκε ένα οκταεδρικό σύμπλοκο με τύπο (Εt3NH)[CoΙΙΙ(saph-4Me)2]•ΜeCΟ2Η•MeOH (2). Απ

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